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Six Things to Consider When Specifying Electrical Connectors for the Mil-Aero Market

Harsh-environment military and aerospace electronics applications require specialized interconnect solutions. The interconnect solutions for these applications not only have to withstand extreme environmental conditions, such as extreme operating temperatures, high vibration, high pressure, and ...
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CMM220 - Captive Screw Fixing M16C

In the world of interconnect solutions especially in the Military and Aero applications having a secure fixing is one of the main requirements of the market. Many designers work on the creation and innovation in the field of and connector fixings features in order to improve customer experience ...
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Miniaturization of soldered contacts

Due to the need for miniaturization in a growing number of electronics systems, more and more designers need to overcome the lack of space with their connecting solutions. In those reduced spaces, they also need to integrate more complex functionalities. For example, some RF (radio-frequency) fu...
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Avant-Premiere : New quarter turn fixing for CMM220

A new quarter-turn fixing has been added to the standard options for the CMM220 series connectors and will be available starting end of july 2015.
It's a fast mate solution developed for harsh environment applications needing regular mating and unmating (such as instrumentation & test...
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If you need very small quantities quickly

If you need a few pieces of connectors during your design stage or testing, it can be difficult to get small quantities without high additional fees or minimum amount of pieces. Nicomatic allows to purchase any CMM rectangular plastic connector from 1 piece, with no additional charge. The object...
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How to preserve a long life and quality to your connectors

A wide range of lock fixing hardware are available for all plastic connectors CMM and metal shell DMM
They maintain the connectors locked in severe conditions such as shocks, vibrations...
To allow full functionality and a long life cycle of your connectors, make sure you ...
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CMM Multi-Mix: The 3rd contact makes the difference!

CMM Multi-Mix design feature comes along with many of its former CMM attributes including space savings, weight reductions, unlimited choices of standard configurations and total contact reliability.
What's different is that you can mix 3 types of contacts into one CMM housing. As the tre...
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A few nice CMM fixings functions

One of the features of CMM connectors is high modularity that is by far the largest on the market. Let's have a look on some of fixing functions that make the difference:

M17 Fixing with Racking Function Before Tightening: allows to mate half the way and then to tighten for an ea...
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High power contacts crimping

The new generation of HP (high power) contacts is crimped using a new process.
Contacts concerned:

series 30 (3mm dia.) for CMM220 & CMM320

series 22 (2.2mm dia.) for its series CMM340

The crimping is optimized by using a 8-indent new technol...
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CMM320 series 90Â° SMT connector !

CMM series 320 LF 90° SMT (3-row right angle SMT connector) extension from Nicomatic is the most compact connector existing on the market today in its category (2mm pitch - up to 120 contacts).
The SMT technology applied to low profile connectors is usually quite problematic when it gets ...
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Latch CMS 90

NICOMATIC offers 90° SMT latches for CMM100/200 series female connectors. It completes the existing range of friction and straight SMT latches available in the range. The SMD latch is generally used in board-to-wire interconnection systems where a connector is fixed to female housings on cab...
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CMM backpotting

Backpotting is the process of filling the back area of a CMM connector, at the entrance area of the contacts inside the plastic housing, using liquid epoxy comprised of Stycast 2651 MM black as the base and Catalyst 9 as the initiator (cross linker). It is then cured to solid stage.
Descripti...
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CMM Crimp Gauge Reducers

Nicomatic offers a solution for crimping of AWG 30 and AWG 32 wires. Using crimp gauge reducers as inserts into standard male or female signal contacts you can achieve a reliable crimp connection meeting the standards needed for typical mil/aero applications.
There are two different ferrule o...
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CMM340 series is unique!

CMM340 serie offers the widest possible mixed layout choice present on the market today, up to 120 low frequency contacts, 64 high frequency or high power contacts of a smaller size (2.2mm dia.) in a 3-row environment. Series 22 Coaxial high frequency contacts allow high speed si...
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CMM Interconnect system

CMM interconnect system is a 2mm pitch connector with proven high reliability under the most extreme environmental conditions of use, vibration & shock severity, high temperature (250°C for 1000 hours exceding the 85°C per the MIL), humidity, salt spray, corrosion and high altitude (...
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In French, Connecteur Micro-Millimetrique or micro-millimetric connector. Its is a 2mm pitch connector.

Board to board, board to wire and wire to wire, CMM connectors give the designer a wide choice of configurations in data transmissions (HF or LF) and high power supplies (HP). The connector is available in mixed layout or in all signal.

b.
CMM 220 : double row of contacts, this connector benefits from the option of a mixed layout, giving the designers a choice of high frequency, high power, fiber optic (upon request) and low frequency.

c.
CMM 320, three rows environment with up to 16 special contacts (up to 120 LF contacts).
CMM 340, three rows with up to 64 special contacts if no signal contact is used.

d.

CMM Multi-Mix, 2 or 3 rows with possibility to mix HF, HP and LF contacts of same type in one connector.

The gold flash plating is backward and forward compatible. Backward means soldered with tin lead and forward with pure tin soldering process. Between the 2 processes there can be a difference in temperature of 20 to 30C and 10 to 30 seconds. Gold flash plating withstands all the different curves, which is a big advantage compared to tin/lead or pure tin.
This also means that you can use your pure tin or tin/lead soldering process for CMM connectors, the choice being dependant more on the other components of the board and the decision to have a total RoHS compliant product.

Yes. The connector has been developed to perform under conditions of extreme vibration. It can be used in a Formula 1 or in a fighter ! (Shock severity: 100g for 6 ms vibration 0,75 mm, 10g RMS 6 hours long random with superimposed sinusoid. No intermitances measured when using on HSLI (High Speed Logic Interrupt) detector with a trip threshold of 2 ns).

CMM as a highly modular standard system allowing up to 20 million configurations!

Therefore, numerous configurations are possible given the type of connector. For example, in a CMM 220 configurations are limited by the space up to 15 cavities. In a CMM320, 32 contacts can be mixed with 20 special contacts "Coaxmatic30". In a CMM340, these possibilities are much higher.
A mixed version of CMM320 and CMM340 allows the best combination in terms of mixed layout and space.

The polarization key can be moved every 2mm. In a CMM 220 connector with 24 ways, we get 11 positions. Add to the P/N "KLL" ("K" means direction 1 towards contact 1, and 2 represents the opposite direction ; "LL" means the number of the shift).

When the current comes from a PCB and out, the designer prefers to put the female on the PCB and male on cable or flex rigid PCB. The option of reverse fixing allows to use the F fixings on the female (CMM 222) and then the M fixing on the male connectors (CMM 221) whereas it is normally not possible. It is a practical solution especially appreciated in a number of applications.

M12 for Y female
F22 F24 for Y male
F23/F25/F26/F30 for V male
PS : F23 and F26 have the same characteristic only the head of the screw is different. Please refer to the CMM Catalogue Guidelines
Comment: F24 is more recommended than F22 for a 2mm board

CMM micro-connectors are submitted to vibration test after being submitted to life test (2 500 mating/unmating cycles) and of course they are mated (between 2 connectors and not 1 connector to PCB). The 3-axis vibration test allows to check the signal stability (no interruption greater than 1 micro second), which is a requirement for MIL-DTL-55302F standard.

LVDS is becoming more and more important, DMM Micro-D Mix connector has been created for this trend and meets 100 ohm impedance required for LVDS. Nicomatic special 4D floating connectoralso meets LVDS requirements and has been tested and approved by some prestigious worldwide clients. CMM also can accept LVDS signal @ 400 MHz, impedance 100 Ohm. Please contact us.

It is difficult to give a standard weight of CMM320 or DMM220 as it varies with the fixing and number of contacts but it is definitively a few grams for example:322Y036H01 is 4.5g and 322Y054H05 is 5.9g.